I remember the Sidkit recast drama, but I can't remember if it was ever proven to be recast or maybe reverse engineered...there was a LOT of drama over Rich, Siderio, the Worldcon pictures and Sid's passing. I don't think that a lot of good will come out of dragging up that whole mess again. The Sidkits are few and far between, and the main players aren't here.
I have a Sid, it is very nice, as all his work was. There is a fairly significant inaccuracy, if that kind of thing bothers you, in that the Steyr magazine is cast in metal, instead of the original plastic.